1. Division of Medical Quantum Science, Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, Japan
2. Division of Information Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5, Takayama-cho, Ikoma, Nara, Japan
3. Department of Radiological Technology, Faculty of Fukuoka Medical Technology, Teikyo University, 6-22, Misaki-machi, Omuta, Fukuoka, Japan